EP1122364B1 - Gestapelte Werkzeuge zum Überkopfkehren - Google Patents

Gestapelte Werkzeuge zum Überkopfkehren Download PDF

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Publication number
EP1122364B1
EP1122364B1 EP01300905A EP01300905A EP1122364B1 EP 1122364 B1 EP1122364 B1 EP 1122364B1 EP 01300905 A EP01300905 A EP 01300905A EP 01300905 A EP01300905 A EP 01300905A EP 1122364 B1 EP1122364 B1 EP 1122364B1
Authority
EP
European Patent Office
Prior art keywords
brush
sweeping
debris
sweeping brush
frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01300905A
Other languages
English (en)
French (fr)
Other versions
EP1122364A2 (de
EP1122364A3 (de
Inventor
Michael T. Basham
Karl Hansen
Joseph F. D'costa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tennant Co
Original Assignee
Tennant Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tennant Co filed Critical Tennant Co
Publication of EP1122364A2 publication Critical patent/EP1122364A2/de
Publication of EP1122364A3 publication Critical patent/EP1122364A3/de
Application granted granted Critical
Publication of EP1122364B1 publication Critical patent/EP1122364B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/02—Brushing apparatus, e.g. with auxiliary instruments for mechanically loosening dirt
    • E01H1/04—Brushing apparatus, e.g. with auxiliary instruments for mechanically loosening dirt taking- up the sweepings, e.g. for collecting, for loading
    • E01H1/045—Brushing apparatus, e.g. with auxiliary instruments for mechanically loosening dirt taking- up the sweepings, e.g. for collecting, for loading the loading means being a rotating brush with horizontal axis
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
    • E01H1/0827—Dislodging by suction; Mechanical dislodging-cleaning apparatus with independent or dependent exhaust, e.g. dislodging-sweeping machines with independent suction nozzles ; Mechanical loosening devices working under vacuum
    • E01H1/0854—Apparatus in which the mechanically dislodged dirt is partially sucked up, e.g. dislodging-sweeping apparatus with dirt collector in brush housing or dirt container

Definitions

  • the present invention relates to surface cleaning machines and especially to a combination of a sweeping brush and a conveying brush which move debris from a surface being cleaned in a highly efficient manner towards a debris hopper which is located forward of the brushes.
  • There is an overthrow primary sweeping tool which functions in cooperation with a co-rotational stacked secondary tool or brush to move debris to a forward mounted hopper.
  • the specific combination of co-rotational tools or brushes arranged to throw debris upwardly and forwardly to a debris hopper, in combination with a movable front flap and a sculptured sweeping zone formed by a forward scroll and a rear wall provide a highly efficient manner of sweeping all types of debris, including sand, gravel, and light litter to the debris hopper for collection.
  • US-A-2,448,328 describes a power driven sweeping machine which uses two brushes to move the swept debris to a debris hopper. This design has the disadvantage that the brushes are one behind the other in the direction of travel of the sweeping machine leading to a long sweeping machine.
  • US-A-4,310,944 describes a powered sweeping machine with a single sweeping brush to pick up debris.
  • the debris is moved to the debris hopper by the action of an air fan. This leads to the machine requiring a complicated air circulation system.
  • DE-U-86 03 415.4 describes a power driven sweeping machine which uses two brushes to move the swept debris to a debris hopper. The positions of the two brushes are fixed relative to one another. This arrangement does not take account of variances in the sweeping and conveyance processes.
  • the present invention relates to a surface cleaning machine and especially to such a machine which has an overthrow primary sweeping brush which cooperates with a co-rotational stacked secondary brush to move debris to a forwardly mounted debris hopper.
  • a primary aim of the present invention is to provide a sweeping machine as described which uses co-rotational stacked sweeping brushes to overthrow debris to a forwardly located debris hopper.
  • Another aim of the present invention is to provide a sweeping machine as described which has a movable front flap.
  • Another aim of the present invention is a debris collection machine as described in which there is a sweeping zone formed by a curved rear wall and a sculptured front wall or scroll which assists in efficiently moving debris from brush to brush and subsequently to the debris hopper.
  • Another aim is to provide a sweeping machine which utilizes the unique combination of a sculptured front wall, co-rotational stacked brushes and a movable front flap to efficiently move debris which is swept toward a forwardly mounted debris hopper.
  • the present invention is directed to a surface cleaning machine as described in Claim 1. Additional advantageous features are described in subclaims 2 to 10.
  • the stacked brush system of the present invention is designed as an efficient, high performance, sweeping system for all types of debris, including sand, gravel, and light litter.
  • the components are selected for increased durability and assembled, relative to each other, to minimize system failure and clogging.
  • the stacked brush sweeping system of the present invention utilizes a rotary brush with a scroll and a movable front flap as the first stage of debris elevation.
  • This primary configuration is referred to in the trade as an over the top system.
  • the front flap can be raised off the ground so bulky debris can easily move into the sweeping chamber.
  • a second tool or conveyance brush is stacked above the first stage or sweeping brush to lift debris higher and into a forward mounted hopper.
  • a common front wall ties the sweeping and conveying systems together to guide debris through the system.
  • the front wall is sculptured to efficiently move debris from brush to brush and to provide a sweeping scroll for the conveyor brush as well as for the sweeping brush.
  • the problem is that both brushes act on the debris in this region and try to move it in two different directions at the same time. Large debris can bridge the gap between brushes and become stuck, other debris hangs up on this first jam and the jam gets progressively worse in a counter-rotating system.
  • the co-rotation system of the present invention does not have a pronounced "inflection point" so debris moves smoothly through the system, efficiency is higher and debris is less likely to become jammed.
  • the front and rear walls forming the sweeping and conveying duct extend about the stacked brushes and are used to smoothly guide debris.
  • the front wall or front scroll provides a temporary buffer for debris so it can be re-swept by the conveyance brush. In this way the re-sweeping of debris by the sweeping brush is minimized, conveyance is improved because momentum of the debris is smoothly transferred from the rotating brushes to the debris and the debris trajectory is precisely controlled. Smooth flow of debris through the conveyance system minimizes impact and potential damage to components.
  • the main sweeping brush and the conveyance brush do not contact their respective scrolls and debris is entrained in void regions between the conveyance brush bristles so there is very little rubbing contact to wear the brushes or the walls defining the sweeping compartment. Because the conveyance brush tip speed matches the speed of debris traveling through the system, there is very little impact loading on brush components.
  • the main sweeping brush and the conveyance brush are mounted on a common pivot so both brushes move together as the main brush moves up and down. Such movement may be required so the main brush can follow the floor contour while sweeping or to adjust for wear during long term service. Moving the tools together on a common pivot, which is properly located, minimizes variances in the sweeping and conveyance processes by holding the brushes in a correct relationship to each other and to the walls defining the sweeping compartment, all of which provides a highly efficient sweeping system.
  • a floor cleaning machine indicated generally at 10 which may mount a driver seat 12, a steering wheel 14 and a control console 16. Wheels 18 support the machine frame 20.
  • a scrubbing device is indicated at 22 any may include a squeegee, such as is shown in U.S. patent 5, 940,928, owned by Tennant Company of Minneapolis, Minnesota, the assignee of the present application. The '928 patent is hereby incorporated by reference in this application.
  • the front of the machine 10 may have a pair of rotating side brushes 32.
  • a main sweeping brush 34 which rotates in a counter-clockwise direction about an axis 36.
  • the brush 34 is driven by an electric motor 38.
  • a conveyance brush or stacked brush 40 which also rotates in a counter-clockwise direction and turns about an axis 42.
  • the drive motor 38 drives both brushes through a main drive belt 44 which turns a pulley system 46 which in turn drives a common belt 48 which wraps around the drive elements of both of the brushes 34 and 40.
  • a sweeping compartment which is defined by a curved rear wall 50 which is contoured to be closely adjacent, but not in contact with either of the sweeping or conveyance brushes but defines the rear wall of the path for debris moving from the area directly adjacent brush 34 into the debris hopper 24.
  • a re-circulation flap 52 which fits closely adjacent the rear of the sweeping brush 34 as is common in the art.
  • the front wall of the sweeping compartment is defined by a forward scroll 54 which has a lower curved portion 56 which generally follows the outline of the sweeping brush 34 and then has a bend 58 joining the lower portion 56 with an upper forwardly slanting wall portion 60. Wall portion 60 terminates in contact with the debris hopper 24.
  • the scroll 54 is sculptured or contoured to assist in directing debris from the co-rotational sweeping brushes 34 and 40 into the debris hopper as shown by the arrows 26.
  • Brush 34 is supported on its opposite ends by arms 62.
  • conveyance brush 40 is mounted on arms 64. Both arms 62 and arms 64 are pivoted about a common point 66.
  • Fig. 4 indicates a normal working position for the brushes and an up position for the brushes, and in each instance it is clear that the spacial relationship between the brushes remains the same.
  • the brushes may be lowered to accommodate brush wear and may be raised for transport.
  • a front flap 70 which is positioned adjacent the bottom of the scroll portion 56 and which will be raised and lowered by a lever system indicated at 72 and shown in more detail in U.S. patent 5,991,953, herein incorporated by reference, and which is owned by the Tennant Company of Minneapolis, Minnesota.
  • the 953' patent shows a mechanism whereby the front flap may be raised or lowered in an environment similar to that disclosed herein.
  • the flap 70 is raised and lowered by the operator for easier entry of bulky debris into the sweeping chamber defined by the scroll and the rear wall.
  • Fig. 3 shows a lowered position and a raised position of the front flap and the consequent movement of the linkage 72.
  • the operator of the machine controls both the raising and lowering of the front flap and the raising and the lowering of the concurrently moving sweeping brush and conveyance brush.
  • the front flap which has a lower flexible portion made of a resilient material will glide along the floor in front of the main brush.
  • the suspension or linkage 72 allows the flap assembly to move up and over obstructions to prevent damage.
  • Debris which passes underneath the flap and enters the sweeping chamber defined by the front scroll and the rear wall will be moved by the counter-clockwise rotating brush 34 up towards the counter-clockwise rotating conveyance brush 40.
  • the transfer will be smooth and the contoured scroll 54 will assist in slowly moving the debris from one brush to the other and then moving the debris up along the portion 60 of the scroll and into the forwardly located debris hopper 24.
  • the sweeping chamber is defined by the two walls and the rear wall 50 closely follows the contour of the stacked brushes.
  • the re-circulation flap at the bottom of the rear wall serves to recycle debris that may be thrown over the top of the main brush instead of being conveyed into the hopper by the conveyance brush. Such recycled debris will then be fed back to the main brush for sweeping in the described manner.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)
  • Brushes (AREA)
  • Cleaning In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (9)

  1. Flächenreinigungsmaschine (10), umfassend einen Rahmen (20), Räder (18) zum Abstützen des Rahmens (20), einen Schmutztrichter (24) auf einem vorderen Teil des Rahmens (20),
    eine zylindrische Kehrbürste (34), die auf dem Rahmen (20) so befestigt ist, dass sie sich um eine Achse (36) drehen kann, die quer zu der Maschinenbewegung ausgerichtet ist, wenn eine Fläche gereinigt wird, einen Antrieb für die Kehrbürste (34), wobei die Kehrbürste (34) hinter dem Schmutztrichter (24) auf dem Rahmen (20) angebracht ist und sich in einer Richtung dreht, derart, dass sie Schmutz von einer zu kehrenden Fläche nach vorne in Richtung des Schmutztrichters (24) wirft,
    eine zylindrische Förderbürste (40), die auf dem Rahmen (20) so befestigt ist, dass sie sich um eine Achse (42) drehen kann, die parallel zur Kehrbürste (34) ist, wobei der Antrieb der Kehrbürste (34) die Förderbürste (40) in derselben Richtung dreht wie die Kehrbürste (34) und die Förderbürste (40) oberhalb der Kehrbürste (34) angeordnet ist und sich relativ zu ihr an einem solchen Ort befindet, dass sie Schmutz, der von der Kehrbürste (34) nach oben transportiert wird, in Aufwärts- und Vorwärts-Richtung in Richtung des Schmutztrichters (24) befördert,
    und einen nach Art einer Spirale gebogenen Körper (54), der vor der Kehrbürste (34) und der Förderbürste (40) und zwischen den Bürsten (34, 40) und dem Schmutztrichter (24) angebracht ist, um den Schmutzstrom von den Bürsten (34, 40) in Richtung des Schmutztrichters (24) zu lenken,
    dadurch gekennzeichnet, dass
    die Kehrbürste (34) mit Hilfe eines Paars von Armen (62), einem an jedem Ende der Kehrbürste (34), auf dem Rahmen befestigt ist und die Förderbürste (40) mit Hilfe eines Paars von Armen (64), einem an jedem Ende der Förderbürste (40), auf dem Rahmen (20) befestigt ist, wobei die Kehrbürsten-Arme (62) und die Förderbürsten-Arme dreh- oder schwenkbar am Rahmen (20) angebracht sind, und zwar an einem gemeinsamen Gelenkpunkt darauf, was die gleichzeitige Bewegung der Bürsten (34, 40) in Richtung einer zu kehrenden Fläche und weg von dieser erlaubt.
  2. Flächenreinigungsmaschine gemäß Anspruch 1, dadurch gekennzeichnet, dass der Bürstenantriebe einen Motor (38) und riemen-oder gurtartige Antriebsmittel (44, 46, 48) aufweist, die den Motor (38) sowohl mit der Kehrbürste (34) als auch der Förderbürste (40) verbinden.
  3. Flächenreinigungsmaschine nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass der nach Art einer Spirale gebogene Körper (54) einen ersten, unteren Teil (56), der von der Kehrbürste (34) beabstandet ist und eine Kurve um sie herum beschreibt, und einen zweiten, oberen Teil (60) besitzt, der sich von einem Ort zwischen den Bürsten (34, 40) nach vorne in Richtung und in Kontakt mit dem Schmutztrichter (24) erstreckt.
  4. Flächenreinigungsmaschine nach Anspruch 3, dadurch gekennzeichnet, dass der untere Teil (56) des nach Art einer Spirale gebogenen Körpers eine Krümmung besitzt, die im Wesentlichen mit dem Umfang der Kehrbürste (34) übereinstimmt oder zu diesem passt.
  5. Flächenreinigungsmaschine nach Anspruch 3 oder Anspruch 4, dadurch gekennzeichnet, dass sie weiterhin eine hintere Wand (50) aufweist, die hinter sowohl der Kehrbürste (34) als auch der Förderbürste (40) am Rahmen (20) befestigt ist, wobei die hintere Wand (50) zusammen mit dem nach Art einer Spirale gebogenen Körper (54) eine Kehrkammer bildet.
  6. Flächenreinigungsmaschine nach Anspruch 5, dadurch gekennzeichnet, dass sie weiterhin eine Rezirkulationsschürze oder-klappe (52) umfasst, die am unteren Ende der hinteren Wand (50) und ganz allgemein benachbart einer hinteren Außenfläche der Kehrbürste (34) angeordnet ist.
  7. Flächenreinigungsmaschine nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass sowohl die Förderbürste (40) als auch die Kehrbürste (34) in der Richtung gegen den Uhrzeigersinn gedreht werden, wobei die Kehrbürste (34) Schmutz nach oben in Richtung der Förderbürste (40) transportiert und die Förderbürste (40) Schmutz von der Kehrbürste (34) in den Schmutztrichter (24) befördert.
  8. Flächenreinigungsmaschine nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass sie eine untere, bewegliche Vorderschürzen- bzw. -Klappenanordnung (70, 72) umfasst, die vor der Kehrbürste (34) auf dem Rahmen (20) angeordnet ist.
  9. Flächenreinigungsmaschine nach Anspruch 8, dadurch gekennzeichnet, dass die Vorderschürzen- bzw. -Klappenanordnung (70, 72) einen unteren biegsamen Teil (70) aufweist und dass die Vorderschürzen- bzw. -Klappenanordnung (70, 72) relativ zu dem nach Art einer Spirale gebogenen Körper beweglich ist.
EP01300905A 2000-02-04 2001-02-01 Gestapelte Werkzeuge zum Überkopfkehren Expired - Lifetime EP1122364B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/498,184 US6421870B1 (en) 2000-02-04 2000-02-04 Stacked tools for overthrow sweeping
US498184 2000-02-04

Publications (3)

Publication Number Publication Date
EP1122364A2 EP1122364A2 (de) 2001-08-08
EP1122364A3 EP1122364A3 (de) 2002-11-13
EP1122364B1 true EP1122364B1 (de) 2005-10-12

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US (1) US6421870B1 (de)
EP (1) EP1122364B1 (de)
DE (1) DE60113886T2 (de)

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Also Published As

Publication number Publication date
EP1122364A2 (de) 2001-08-08
EP1122364A3 (de) 2002-11-13
DE60113886D1 (de) 2006-02-23
US6421870B1 (en) 2002-07-23
DE60113886T2 (de) 2006-07-27

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